Ok progress,,
I have the wing installed, tail installed, fillets mostly done. I got ahead of myself and realized I CA's the elevator fairings on before I installed the horn bearings. Dumb dumb,, so I had to cut the fairings part way off, install bearings and reinstall the carefully hacked off parts. At least I remembered it before I put on the fillets!
anyway, a couple words about the design philosophy behind this airplane.
Most everything was done for a specific reason. The general purpose of this plane was to explore different motor~ESC~ battery combinations to get a feel for what else will work besides the already proven Plettenburt Shulze combination, that is pretty pricey. ( though certainly top of the line equipment)
So, in order to make it easy to change battery sizes, while being able to accomodate the inherant changes in CG that would result, It has a high wing, with anhedryll. This allows the vertical CG to be in the right place by putting the battery closer to the actual CG of the airframe. I should mention I moved the motor forward to allow the battery to be carried further back on the fuse, again, to minimize the effect of battery size on the balance of the airframe. The motor mount is front mounted, with clearance for a vast array of motors to be fitted. At this point, I have an AXI 2826-10, two Hackers, one is an and A30-8XL( 1100 KV) and an A30-10XL ( 900KV). I also have a scorpion 3026-10 980 kv, and am working on getting a Hacker A40,, cant recall the number right now. There is also a Rim Fire .32 that I have that looks very interesting. I have three different batteries to try, ranging from the new Thunder Power to the Turnigy Nano tech batteries. So you can see I designed in some ease of experimentation for this plane.
The nose design, I touched on this on Rudy's thread about cooling. I am forcing air in through the slit inlets on the inboard side, I beleive the inboard side of the nose is slightly positive to the outboard side due to the way the airplane moves around the circle. The outboard side has a cheek cowl that finishes with a small lip to generate some negative pressure to help direct air to flow over the electronics which are mounted in the bay with slots running vertically through the ply doubler. The outboard cheek cowl is glassed in place and acts as a doubler for the motor mount plate. The nose ring is ply and has basicaly a tongue and groove that captures the fuse front in the ring and balsa nose rings.The inboard cheek is removable and acts as a plenum to allow the air to slow down and move across all the components. The battery will mount on the outboard side of the fuse. I found in my P-40 that by mounting the battery this way, I basically eliminated the need for most of the tip weight. The Electrajet is 640 inches of wing, and a TVC of .530. It should be able to carry an aft CG and still be very stable, or a forward CG and still have good corner. I plan on trying both extremes.
So, you can see the why now,,
Oh one other note, the side view is pretty much the outline for an F-16 which came to Shaw air force base, like 3 months after I got off active duty, but I always loved it, so here is my homage to that beautifull bird. I hope I do it justice.
Topic: New profile "Electrajet" (Read 1828 times)
